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The red flour beetle (Tribolium castaneum) is a species of beetle in the family Tenebrionidae, the darkling beetles. The red flour beetle, and other closely related beetles like Gnatocerus cornutus , are a worldwide pest of stored products, particularly food grains , and a model organism for ethological and food safety [ 1 ] research.
This species appears as a shield beetle, with an orange bottom, a big black stripe, a black joiner with two white quarter ovals and a small white oval. the head is round and the antennae are black with yellow tips. [3]
The palm weevil Rhynchophorus ferrugineus is one of two species of snout beetle known as the red palm weevil, Asian palm weevil or sago palm weevil.The adult beetles are relatively large, ranging between 2 and 4 centimetres (1 and 1 + 1 ⁄ 2 inches) long, and are usually a rusty red colour—but many colour variants exist and have often been classified as different species (e.g., R. vulneratus).
Aulacophora foveicollis, the red pumpkin beetle, is a species of beetle in the family Chrysomelidae. It is a foliar pest of members of the Cucurbitaceae , particularly the pumpkin . [ 2 ] It is also a pest of millets in India.
Pliny the Elder discusses beetles in his Natural History, [158] describing the stag beetle: "Some insects, for the preservation of their wings, are covered with an erust —the beetle, for instance, the wing of which is peculiarly fine and frail. To these insects a sting has been denied by Nature; but in one large kind we find horns of a ...
The more than 6,000 described species have a global distribution and are found in a variety of habitats. They are oval beetles with a domed back and flat underside. Many of the species have conspicuous aposematic (warning) colours and patterns, such as red with black spots, that warn potential predators that they taste bad.
Tribolium lay their eggs in a food source such as flour. These hatch into larvae which proceed to feed and grow within the food, avoiding light. There are usually 7 or 8 larval instars, but there can be as few as 5 or as many as 11 depending on food, temperature and humidity.
Harmonia axyridis is a typical coccinellid beetle in shape and structure, being domed and having a "smooth" transition between its elytra (wing coverings), pronotum, and head. It ranges from 5.5–8.5mm in size. The common color form, f. "succinea", is orange or red in colouration with 0–22 black spots of variable size. The other usual forms ...